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IgG-Switched CLL Ha...
IgG-Switched CLL Has a Distinct Immunogenetic Signature from the Common MD Variant : Ontogenetic Implications
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Vardi, Anna (author)
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Agathangelidis, Andreas (author)
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- Sutton, Lesley-Ann (author)
- Uppsala universitet,Institutionen för immunologi, genetik och patologi
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Chatzouli, Maria (author)
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Scarfo, Lydia (author)
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- Mansouri, Larry (author)
- Uppsala universitet,Hematologi och immunologi
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Douka, Vassiliki (author)
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Anagnostopoulos, Achilles (author)
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Darzentas, Nikos (author)
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- Rosenquist, Richard (author)
- Uppsala universitet,Hematologi och immunologi
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Ghia, Paolo (author)
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Belessi, Chrysoula (author)
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- Stamatopoulos, Kostas (author)
- Uppsala universitet,Institutionen för immunologi, genetik och patologi
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: Clinical Cancer Research. - 1078-0432 .- 1557-3265. ; 20:2, s. 323-330
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- PURPOSE:IgG-switched chronic lymphocytic leukemia (G-CLL) is a rare variant of CLL, whose origin and ontogenetic relationship to the common IgM/IgD (MD-CLL) variant remains undefined. Here we sought for clues regarding the ontogeny of G-CLL versus MD-CLL by profiling the relevant IG gene repertoires.EXPERIMENTAL DESIGN:Using purpose-built bioinformatics methods, we performed detailed immunogenetic profiling of a multinational CLL cohort comprising 1256 cases, of which 1087 and 169 expressed IG mu/delta and gamma heavy chains, respectively.RESULTS:G-CLL has a highly skewed IG gene repertoire that is distinct from MD-CLL, especially in terms of: (i) overuse of the IGHV4-34 and IGHV4-39 genes; and, (ii) differential somatic hypermutation (SHM) load. Repertoire differences held also when comparing subgroups with similar SHM status and were mainly attributed to the exclusive representation in G-CLL of two major subsets with quasi-identical (stereotyped) B-cell receptors. These subsets, namely #4 (IGHV4-34/IGKV2-30) and #8 (IGHV4-39/IGKV1(D)-39), were found to display sharply contrasting SHM and clinical behavior.CONCLUSIONS:G-CLL exhibits an overall distinct immunogenetic signature from MD-CLL, prompting speculations about distinct ontogenetic derivation and/or immune triggering. The reasons underlying the differential regulation of SHM among G-CLL cases remain to be elucidated.
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- By the author/editor
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Vardi, Anna
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Agathangelidis, ...
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Sutton, Lesley-A ...
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Chatzouli, Maria
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Scarfo, Lydia
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Mansouri, Larry
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show more...
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Douka, Vassiliki
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Anagnostopoulos, ...
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Darzentas, Nikos
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Rosenquist, Rich ...
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Ghia, Paolo
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Belessi, Chrysou ...
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Stamatopoulos, K ...
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show less...
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Clinical Cancer ...
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Uppsala University